elephant seal

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Either of two large seals, Mirounga angustirostris of North American Pacific coastal waters or M. leonina of Antarctic and subantarctic coastal waters, the males of which have an inflatable, trunklike proboscis.

from The Century Dictionary.

• noun Same as seaelephant.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A large marine mammal of the genus Mirounga, which is the largest of the pinnipeds.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun either of two large northern Atlantic earless seals having snouts like trunks